>I use ssh (on my own machines, personal use). My primary box (for ssh, >it's the my daemon) is on dsl. The only machine that I log in from >(client?) is on the same ISP, and is on a dial-up line. > >I'd like to allow only those IPs that I might dynamically get. How would >this be accomplished? I checked my secure log file (on the daemon box), >and have examples of IPs that I was assigned. Nota bene: It seems like >only the first and second parts are consistant. So, how can I specify a >range thus: 200.100.x.x ? Would I use a zero, or 'x', or ...? > >I checked out the openssh website - only man pages. I read the man page, >but didn't see anything related to this. I used Google's linux search - >nothing this specific. > >I figure that I could use either sshd_config's ListenAddress or >/etc/hosts.allow or hosts.deny. > >Btw, I figured out how to set up iptables to use a non-default port, and >I use AllowUsers in the sshd_config (on the machine I log into). 200.100.0.0/16 or 200.100.0.0/255.255.0.0 To secure my ssh server I use public/private key, AllowUsers to only me and denyhosts. Denyhosts is a program that automatically puts unwanted sites into my hosts.deny file. There are a boatload of addresses in there. I rarely get login attempts that actually get past hosts.deny any more and I used to get a lot. I didn't change the port on mine. With the public/private key and the user restricted to only me I think my server is pretty immune to being hacked. Denyhosts just gives me a little satisfaction that I'm messing with the hackers. I like my setup because it is easy to manage and very secure. I did try a port knocking scheme with iptables and an iptables setup that blocked multiple logins from the same address. They worked fine but were more problematic to use. -- Knute Johnson Molon Labe...
